do i need to to add 14.7 for the map sensor on the boost retard curve on the 7535? I see nothing in the instructions to do so

I had to do it on the boost psi curve on the 7562

thanks

Yes you need to add in barometric pressure. The best way to figure it out is to turn the ignition on without starting the engine. Connect the laptop to the MSD Digital 7. The red line in the Boost retard curve will move somewhere between 12.5-14.75psi depending on altitude. This would be your zero point if you were looking at a mechanical boost gauge.